Temperature control device for reaction furnace

Abstract

The utility model discloses a reaction furnace temperature control device which comprises a reaction furnace, a plurality of heating elements, a thermocouple and a control assembly, the reaction furnace is provided with a temperature control area, the temperature control area comprises a plurality of sub-areas which are sequentially distributed along the length direction of the reaction furnace, the number of the sub-areas is n, n is greater than or equal to 2, and n is greater than or equal to 2. The heating pieces and the corresponding sub-areas are arranged in a staggered mode, and the heating pieces are located at the ends, away from the center of the temperature control area, of the corresponding sub-areas. The thermocouples are electrically connected with the control assembly so as to detect the temperature of the corresponding sub-areas, and the heating pieces are electrically connected with the control assembly so as to control the heating pieces to heat. According to the utility model, the temperature of the reaction furnace can be more accurately controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature control equipment technical field especially relates to a reaction furnace temperature control device. BACKGROUND

[0002] In chemical industry, the production of products usually needs to control the temperature gradient of its reaction center area, so that the raw materials can be stably reacted according to the temperature gradient in a certain area.

[0003] In the prior art, for temperature control equipment, more zone heating pipe wall temperature control method is used to control the generation area temperature. However, this method often has two pain points: on the one hand, due to the mutual influence of thermal radiation and heat convection, simply controlling the temperature of a certain area, or adjusting the power of the heating element of the adjacent area at the same time, it is difficult to meet the requirement of precise temperature control, on the other hand, there is a large error between the temperature of the pipe wall and the temperature of the pipe center, at the same time, when the raw materials react chemically or physically, they will release / absorb heat, and this part of heat will also cause the change of the temperature of the pipe center. SUMMARY

[0004] The technical problem to be solved by the utility model is that the existing temperature control equipment is difficult to meet the requirement of precise temperature control.

[0005] In order to solve the above technical problem, the utility model provides a reaction furnace temperature control device, which comprises a reaction furnace, a plurality of heating elements, a thermocouple and a control assembly, the reaction furnace has a temperature control area, the temperature control area comprises a plurality of subareas which are distributed in turn along the length direction of the reaction furnace, the number of the subareas is n, and n is greater than or equal to 2, the heating element is arranged in a staggered manner with the corresponding subarea, and the heating element is located at one end of the corresponding subarea which deviates from the center of the temperature control area; the thermocouple is electrically connected with the control assembly to detect the temperature of the corresponding subarea, and the heating element is electrically connected with the control assembly to control the heating of the heating element.

[0006] In some embodiments, the number of the subareas is n, wherein n=3, one heating element is arranged at one end of the subarea deviating from the center of the subarea located at both ends.

[0007] In some embodiments, the number of the subareas is n, wherein n>3.

[0008] When n is an odd number, the subarea located at the center is the central area, and one heating element is arranged at one end of the subarea deviating from the center of the subarea located at both ends of the central area.

[0009] In some embodiments, the number of the subareas is n, wherein n>3.

[0010] When n is even, each of the ends of the sub-regions away from the center is provided with one of the heat generating members.

[0011] In some embodiments, each of the sub-regions is provided with a temperature measuring point at a corresponding position on the outer wall of the reaction furnace, and the temperature measuring point is provided at a corresponding position with the center of the sub-region.

[0012] In some embodiments, the reaction furnace comprises an outer shell, an insulation layer, and a furnace body, the outer shell surrounds the periphery of the furnace body, and the insulation layer is arranged between the outer shell and the furnace body.

[0013] In some embodiments, the heat generating member is arranged in the insulation layer.

[0014] In some embodiments, the heat generating member is arranged on the outer periphery of the outer shell.

[0015] In some embodiments, the insulation layer is made of thermal insulation cotton material.

[0016] In some embodiments, the control assembly comprises an industrial computer and a PID controller, the output end of the PID controller is electrically connected with the heat generating member, the input end of the PID controller is electrically connected with the industrial computer, and the industrial computer is electrically connected with the thermocouple.

[0017] Compared with the prior art, the reaction furnace temperature control device provided in the embodiments of the present application has the following beneficial effects:

[0018] In the embodiments of the present application, the heat generating member and the corresponding sub-region are arranged in a staggered manner, that is, the heat generating member does not directly heat the sub-region directly below it, but heats the region adjacent to the sub-region, so as to utilize the heat radiation generated when the heat generating member generates heat to act on the sub-region arranged in a staggered manner, effectively reducing the local overheating phenomenon that may be caused by direct heating, and at the same time, utilizing the natural thermal convection effect formed inside the reaction furnace to help the heat transfer from the heating area to the area not directly heated, further promoting the uniform distribution of temperature in the entire temperature control area. In addition, each sub-region is equipped with a thermocouple for real-time monitoring of the temperature change of the region, so as to collect the temperature data of each sub-region and adjust the heating efficiency of the heat generating member accordingly. Through the closed-loop control mechanism, any temperature deviation can be responded and corrected in time, so as to ensure that each sub-region can be maintained within the preset temperature range, thereby ensuring that the step temperature of the center of the entire temperature control area is more accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of a reaction furnace provided by the embodiments of the present application;

[0020] Figure 2 is a structural schematic view of a reaction furnace provided by the embodiments of the present application; Figure 1a sectional view along the A-A direction of the reaction furnace;

[0021] Figure 3 is a frame schematic diagram of the reaction furnace temperature control device provided in the embodiment of the utility model;

[0022] In the figure, 1, reaction furnace; 11, temperature control area; 111, sub-area; 13, shell; 14, heat preservation layer; 15, furnace body; 2, heating element; 3, thermocouple; 4, control assembly; 41, industrial computer; 42, PID controller. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model will be described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0024] As Figures 1 to 3 shown, the utility model provides a kind of reaction furnace 1 temperature control device, including reaction furnace 1, multiple heating element 2, thermocouple 3 and control assembly 4, reaction furnace 1 has temperature control area 11, temperature control area 11 includes multiple sub-area 111 sequentially distributed along the length direction of reaction furnace 1, the number of sub-area 111 is n, and n≥2, heating element 2 is set with corresponding sub-area 111 staggered, and heating element 2 is located at corresponding sub-area 111 end away from the center of temperature control area 11;Thermocouple 3 is electrically connected with control assembly 4 to detect the temperature of corresponding sub-area 111, and heating element 2 is electrically connected with control assembly 4 to control heating element 2 heating.

[0025] The embodiment is by heating element 2 and corresponding sub-area 111 staggered arrangement, i.e. heating element 2 does not directly heat the sub-area 111 directly below, but heats the area adjacent to sub-area 111, to utilize the heat radiation generated when heating element 2 heats and acts on the sub-area 111 set staggered with it, effectively reduces the local overheating phenomenon possibly brought by direct heating, and simultaneously utilizes the natural heat convection effect formed inside reaction furnace 1, to help heat transfer from heating area to area not directly heated, to further promote the uniform distribution of temperature in the entire temperature control area 11. In addition, each sub-area 111 is equipped with thermocouple 3 for real-time monitoring of the temperature change of the area, to collect the temperature data of each sub-area 111, and adjust the heating efficiency of heating element 2 accordingly, through the closed-loop control mechanism, any temperature deviation can be responded and corrected in time, to ensure that each sub-area 111 can be maintained within the preset temperature range, to guarantee that the step temperature of the center of the entire temperature control area 11 is more accurately controlled.

[0026] It should be noted that the closed-loop control mechanism used in the embodiment can be calculated by simulation software simulation.

[0027] In some embodiments, the number of sub-regions 111 is n, where n = 3, and each of the sub-regions 111 at the two ends is provided with a heating element 2 at the end away from the center.

[0028] In this embodiment, the heating elements 2 are placed at the edges of the sub-regions 111 at the two ends, and when the corresponding sub-regions 111 need to be heated, the entire sub-region 111 can be heated more evenly using the heat radiation effect; when the sub-regions 111 in the middle need to be heated, the heat generated by the two resistive heating elements can be transmitted through the heat conduction between the adjacent sub-regions 111, so that the middle sub-regions 111 can also be properly heated. This helps to reduce the risk of local overheating and makes the temperature distribution in the entire reaction furnace 1 more uniform. In addition, since the heating elements 2 are not located directly at the center of the corresponding sub-regions 111, the heat they generate will not be immediately concentrated in a small area, but will gradually spread out, reducing temperature fluctuations that can be caused by direct contact between the heat source and the heated object, and facilitating the realization of a smoother temperature gradient, thereby improving the accuracy of temperature control for each sub-region 111.

[0029] In some embodiments, the number of sub-regions 111 is n, where n > 3; when n is an odd number, the sub-region 111 at the center is the central region, and each of the sub-regions 111 at the two ends of the central region is provided with a heating element 2 at the end away from the center.

[0030] This embodiment takes five sub-regions 111 as an example and numbers them from 1 to 5, with the third sub-region 111 at the center. Each of the sub-regions 111 at the two ends of the central region (i.e., the second and fourth sub-regions 111) is provided with a heating element 2 at the end away from the center. By placing the heating elements 2 outside the sub-regions 111 at the two ends of the central region, the heat radiation effect can be effectively utilized to heat these sub-regions 111 and indirectly heat the central region, which helps to form a more uniform temperature field, especially near the center, avoiding the problem of local overheating that can be caused by direct heating.

[0031] In addition, the power of the heating elements 2 of the sub-regions 111 on both sides of the center can be adjusted as needed to adjust the temperature distribution in the entire reaction furnace 1. For example, if the temperature of the central region needs to be increased, the power of the heating elements 2 on both sides can be increased; conversely, if the temperature of the corresponding regions at the two ends needs to be provided, the power of the corresponding heating elements 2 can be increased.

[0032] In some embodiments, the number of sub-regions 111 is n, where n > 3; when n is an even number, each of the sub-regions 111 is provided with a heating element 2 at the end away from the center.

[0033] By placing a heating element 2 at the edge of each sub-region 111 (i.e., away from the center of the entire reactor 1), this embodiment can utilize the thermal radiation effect to heat each corresponding sub-region 111, which helps to form a more uniform temperature field and avoids the problem of local overheating of the corresponding sub-region 111 caused by direct heating. In addition, each sub-region 111 has its own heating element 2, which enables the system to more accurately adjust the temperature of each sub-region 111. Whether it is necessary to increase or decrease the temperature of a specific sub-region 111, the power of each heating element 2 can be individually controlled to flexibly adjust the temperature of each sub-region 111 as needed, thereby achieving fine temperature gradient control within the entire reactor 1.

[0034] In some embodiments, each sub-region 111 is provided with a temperature measuring point at a corresponding position on the outer wall of the reaction furnace 1 , and the temperature measuring point is provided corresponding to the center of the sub-region 111 .

[0035] Understandably, if the temperature measurement point is located at the edge of a sub-region 111 or at another non-central location, it may be affected by the external environment or adjacent sub-regions 111, resulting in inaccurate measurement results. This embodiment, by placing the temperature measurement point at a location corresponding to the center of a sub-region 111, can more accurately reflect the actual temperature of that sub-region 111, thereby achieving more precise and stable temperature control and ensuring that each sub-region 111 remains within the desired temperature range.

[0036] like Figure 2 As shown, the reactor 1 comprises an outer shell 13, an insulation layer 14, and a furnace body 15. The outer shell 13, as the outermost layer, protects the internal components from the external environment and surrounds the furnace body 15. The interior of the furnace body 15 is where the chemical reaction directly takes place, allowing the materials to react. An insulation layer 14 is provided between the outer shell 13 and the furnace body 15 to reduce heat loss from the furnace body 15 to the outside, thereby maintaining a stable temperature within the furnace and reducing energy consumption. This allows the energy input into the furnace body 15 to be more concentratedly used to heat the reactants, thereby improving heating efficiency.

[0037] In some embodiments, the heating element 2 is disposed within the insulation layer 14, allowing the heat generated by it to be directly transferred to the furnace body 15 without dissipating a large amount into the external environment. This improves energy utilization efficiency and reduces energy waste. Furthermore, the heating element 2 within the insulation layer 14 distributes heat more evenly, helping to create a more uniform temperature field, avoiding localized overheating or cold zones and ensuring temperature consistency throughout the reaction area.

[0038] In some embodiments, the heat-generating element 2 is arranged on the outer circumferential side of the shell 13, reducing the risk of direct contact with the high-temperature area, thereby reducing the possibility of electrical failure (such as short circuit). In addition, since the heat-generating element 2 is located outside the shell 13, when replacement or maintenance is required, the technician can directly access the heat-generating element 2 for quick repair or replacement without disassembling the entire reaction furnace 1, greatly reducing maintenance costs and time. In addition, since the heat-generating element 2 is not arranged in the heat preservation layer 14, the heat preservation layer 14 can fully focus on its heat insulation function, further improving the heat preservation effect and reducing heat loss.

[0039] In some embodiments, the heat preservation layer 14 is made of heat preservation cotton material, which has a very low thermal conductivity to effectively prevent heat from being transmitted through conduction, thereby reducing heat loss from the inside of the reaction furnace 1 to the external environment.

[0040] As shown in Figure 3 The control assembly 4 includes an industrial computer 41 and a PID controller (Proport ion I ntegration Different iat ion, proportional-integral-differential controller) 42. The output end of the PID controller 42 is electrically connected with the heat-generating element 2, and the input end of the PID controller 42 is electrically connected with the industrial computer 41. The industrial computer 41 is electrically connected with the thermocouple 3.

[0041] The thermocouple 3 of the present embodiment is installed in different sub-regions 111 of the reaction furnace 1, which monitors the temperature of each region in real time and sends these data to the industrial computer 41. The industrial computer 41 receives the temperature data from the thermocouple 3 and processes and analyzes it. It can display the current temperature, draw a temperature curve, record historical data, etc. The operator can set the target temperature of each sub-region 111 through the industrial computer 41. After receiving the target temperature and the actual temperature, the industrial computer 41 calculates the required heating power through its internal algorithm, and the output signal of the PID controller 42 directly controls the heating power of the heat-generating element 2 to achieve precise control of the temperature.

[0042] For example, if the set internal temperature is 600 degrees, the industrial computer 41 calculates the required external temperature at 600 degrees. The industrial computer 41 outputs the external temperature signal to the PID controller 42, which controls the heat-generating element 2 to generate heat. The real-time external temperature is measured by the thermocouple 3, and the PID controller 42 controls the external temperature while outputting the external temperature signal to the industrial computer 41. The industrial computer 41 calculates the internal temperature value corresponding to the feedback external temperature and compares it with the initial set input internal temperature of 600 degrees. Then, the signal for controlling the external temperature is adjusted synchronously to achieve the means of controlling the internal temperature by the external temperature.

[0043] It should be noted that the heat-generating element 2 of the present embodiment uses an electric heating wire.

[0044] In summary, the utility model embodiment provides a kind of reaction furnace 1 temperature control device, it is by heating element 2 and corresponding subarea 111 misregistration setting, i.e. heating element 2 does not directly heat the subarea 111 right below it, but heats the area adjacent to subarea 111, to utilize the heat radiation generated when heating element 2 heats and acts on the subarea 111 misregistration setting, effectively reduce the local overheating phenomenon possibly brought by direct heating, simultaneously utilize the thermal convection effect formed naturally inside reaction furnace 1, help heat transfer from heating zone to the area not directly heated, further promote the uniform distribution of temperature in entire temperature control area 11.In addition, each subarea 111 is equipped with thermocouple 3, for real-time monitoring the temperature change of this area, to collect the temperature data of each subarea 111, and adjust the heating efficiency of heating element 2 accordingly, by the closed-loop control mechanism, any temperature deviation can be responded and corrected in time, ensure that each subarea 111 can be maintained in the preset temperature range, so as to guarantee the ladder temperature of entire temperature control area 11 center to be more accurately controlled.

[0045] The above is only the preferred embodiment of the utility model, it should be pointed out that, for the ordinary skill in the art, without departing from the technical principle of the utility model, can make a number of improvements and substitutions, these improvements and substitutions also should be regarded as the protection scope of the utility model.

Claims

1. A temperature control device for a reactor, characterized in that: It includes a reactor, multiple heating elements, thermocouples and a control component. The reactor has a temperature control area, which includes multiple sub-areas distributed in sequence along the length direction of the reactor. The number of the sub-areas is n, and n≥2. The heating elements are staggered with the corresponding sub-areas, and the heating elements are located at one end of the corresponding sub-areas away from the center of the temperature control area; the thermocouple is electrically connected to the control component to detect the temperature of the corresponding sub-area, and the heating element is electrically connected to the control component to control the heating of the heating element.

2. The temperature control device for a reaction furnace according to claim 1, characterized in that: The number of the sub-regions is n, wherein n=3, and one heating element is provided at each end of the sub-regions at both ends, the end away from the center.

3. The temperature control device for a reactor according to claim 1, characterized in that: The number of the sub-regions is n, where n>3; When n is an odd number, the sub-region located at the center is the central region, and the sub-regions located at both ends of the central region are each provided with a heating element at one end away from the center.

4. The temperature control device for a reactor according to claim 1, characterized in that: The number of the sub-regions is n, where n>3; When n is an even number, one heating element is provided at each end of the sub-region away from the center.

5. The temperature control device for a reaction furnace according to claim 1, characterized in that: Each of the sub-regions is provided with a temperature measuring point at a corresponding position on the outer wall of the reaction furnace, and the temperature measuring point is provided corresponding to the center of the sub-region.

6. The temperature control device for a reaction furnace according to claim 1, characterized in that: The reaction furnace comprises an outer shell, a heat-insulating layer and a furnace body. The outer shell is arranged around the circumference of the furnace body, and the heat-insulating layer is arranged between the outer shell and the furnace body.

7. The temperature control device for a reaction furnace according to claim 6, characterized in that: The heating element is arranged in the thermal insulation layer.

8. The temperature control device for a reaction furnace according to claim 6, characterized in that: The heating element is arranged on the outer peripheral side of the housing.

9. The temperature control device for a reaction furnace according to claim 6, characterized in that: The thermal insulation layer is made of thermal insulation cotton.

10. The temperature control device for a reaction furnace according to claim 1, characterized in that: The control component includes an industrial computer and a PID controller, the output end of the PID controller is electrically connected to the heating element, the input end of the PID controller is electrically connected to the industrial computer, and the industrial computer is electrically connected to the thermocouple.

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